Improvement in lock-spindles



UNITED STATES PATENT ()FFIon,

ALBERT KIRKS, OF CANTON, 01110.

IMPROVEMENT IN LOCK-SPINDLES.

Specification forming part of Letters Patent No. 156,738, dated November10, 1874; application tiled August 15, 1874.

To all whom it may concern:

Be it known that 1, ALBERT KIRKs, of Oanton, Stark county, Ohio, haveinvented a new and Improved Safe-Spindle, of which the following is aspecification:

The accompanying drawing represents my improvement applied to asafe-door.

The invention consists in the construction and arrangement ofpacking-rings in connection with the conical portion of the lock-spindleand the joint of the laminae composing the safe-door, as hereinafterdescribed.

In the drawing, A represents the door of a burglar-proof safe; B, thespindle, which is made, as indicated in the drawing, of double conicalshape, with cylindrical front part of smaller diameter, to which theknobis screwed in the usual manner. Tightly-fitting rings 0, of rubberor other elastic material, are placed on the spindle B at the part oflargest diameter, being the point from which the cones taper in oppositedirections. One of said rings is applied so as to embrace one of thecones, the other the opposite cone, to form a tight joint. The rings 0are of suitable width and strength, and are seated in correspondingrecesses of the inner wall-plates, being firmly packed by the connectionof the same, so as to form an air-tight socket for the spindle. Thisprevents the breaking open of the safe by drawing off the air with anair-pump and introducing fine powder or other explosive to the safe orlook with the current of the returning air. It gives, furthermore, thespindle an easy yet noiseless motion in its bearings in the door.

I do not claim a conical spindle nor the application of packing tospindles in general, for the general purposes hereinbefore indi cated.

Having thus described my invention, I claim as new and desire to secureby Letters Patent In combination with the spindle having a doubleconical form at or about the center. and the recessed laminae of thesafe-door, the elastic packing-rings (J, applied to said spindle onopposite sides of the point of largest diameter, as shown and described,for the purpose specified.

ALBERT KIRKS.

Witnesses:

CARL ALBRECHT, LOUIS SOHAEFER.

